γ-Fe2O3/polyaniline–levodopa (γ-Fe2O3/PANI–levodopa) composites were prepared using γ-Fe2O3 and levodopa as dopants and ammonium persulfate as oxidant. The composites were characterised by Fourier transform infrared spectra and confirmed that the γ-Fe2O3 and levodopa were doped into the PANI chain. A transmission electron microscopy study revealed that the size of the γ-Fe2O3 was of the order of 10 nm, whereas the composite size was of the order of 25 nm; furthermore, it was observed that the PANI–levodopa chain was intercalated to form a core shell of γ-Fe2O3. Cyclic voltammetry and magnetisation studies showed that the γ-Fe2O3/PANI–levodopa composites had both electrochemical activity and conductive superparamagnetism, so these composites may be well suited for chemotherapy drugs.
In Situ Scanning Transmission Electron Microscopy Study of MoS2 Formation on Graphene with a Deep-Learning Framework